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Groundwater-quality data and geophysical information for relatively deep wells (wells generally more than 300 feet deep) containing saline water (dissolved-solids concentrations greater than 2,000 milligrams per liter) are limited throughout the state of Texas. Information derived from geophysical well logs can be used to estimate groundwater salinity. Geophysical logs were collected in 2021 from 10 of the 12 wells completed in selected aquifers (Trinity, Edwards-Trinity (Plateau), Carrizo-Wilcox, Sparta, and Yegua-Jackson) in Texas.
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Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features. This map is derived from GIS (geospatial information system) data. It represents a repackaging of GIS data in traditional map form, not creation of new information. The geospatial data in this map are from selected National Map data holdings and other government sources.
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Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features. This map is derived from GIS (geospatial information system) data. It represents a repackaging of GIS data in traditional map form, not creation of new information. The geospatial data in this map are from selected National Map data holdings and other government sources.
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Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features. This map is derived from GIS (geospatial information system) data. It represents a repackaging of GIS data in traditional map form, not creation of new information. The geospatial data in this map are from selected National Map data holdings and other government sources.
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These vector contour lines are derived from the 3D Elevation Program using automated and semi-automated processes. They were created to support 1:24,000-scale CONUS and Hawaii, 1:25,000-scale Alaska, and 1:20,000-scale Puerto Rico / US Virgin Island topographic map products, but are also published in this GIS vector format. Contour intervals are assigned by 7.5-minute quadrangle, so this vector dataset is not visually seamless across quadrangle boundaries. The vector lines have elevation attributes (in feet above mean sea level on NAVD88), but this dataset does not carry line symbols or annotation.
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Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features. This map is derived from GIS (geospatial information system) data. It represents a repackaging of GIS data in traditional map form, not creation of new information. The geospatial data in this map are from selected National Map data holdings and other government sources.
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The availability of groundwater-quality data along with geophysical information for relatively deep wells (wells generally more than 300 feet deep) containing saline water (dissolved-solids concentrations greater than 2,000 milligrams per liter)) is limited throughout the state of Texas. Water-quality samples are important for calibrating estimates of groundwater salinity derived from geophysical well logs. Water-quality samples and geophysical logs were collected from a total of 12 wells completed in selected aquifers (Trinity, Edwards-Trinity (Plateau), Carrizo-Wilcox, Sparta, and Yegua-Jackson) in Texas.


map background search result map search result map USGS Topo Map Vector Data (Vector) 21638 Hye TX FileGDB USGS Topo Map Vector Data (Vector) 22687 Johnson City TX FileGDB USGS Topo Map Vector Data (Vector) 4345 Blanco TX (published 20220820) FileGDB USGS Topo Map Vector Data (Vector) 70297 Hammetts Crossing TX (published 20220822) Shapefile USGS Topo Map Vector Data (Vector) 21293 Howell Mountain TX (published 20220822) FileGDB USGS Topo Map Vector Data (Vector) 30040 Monument Hill TX (published 20220823) FileGDB USGS Topo Map Vector Data (Vector) 34502 Payton TX (published 20220823) Shapefile USGS Topo Map Vector Data (Vector) 34502 Payton TX (published 20220823) FileGDB USGS Topo Map Vector Data (Vector) 38368 Rocky Creek TX (published 20220820) FileGDB USGS Topo Map Vector Data (Vector) 38750 Round Mountain TX (published 20220823) FileGDB USGS US Topo 7.5-minute map for Round Mountain, TX 2019 USGS NED 1/3 arc-second Contours for Llano E, Texas 20220819 1 x 1 degree Shapefile Water-Quality Data and Geophysical Logs for Determination of Saline Groundwater in Selected Aquifers in Texas, 2021 Geophysical Logs for Determination of Saline Groundwater in Selected Aquifers in Texas, 2021 US Topo 7.5-minute map for Spring Branch, TX US Topo 7.5-minute map for Payton, TX US Topo 7.5-minute map for Howell Mountain, TX USGS Topo Map Vector Data (Vector) 21293 Howell Mountain TX (published 20220822) GeoPackage USGS Topo Map Vector Data (Vector) 34502 Payton TX (published 20220823) GeoPackage USGS Topo Map Vector Data (Vector) 34605 Pedernales Falls TX (published 20220823) GeoPackage USGS Topo Map Vector Data (Vector) 21638 Hye TX FileGDB USGS Topo Map Vector Data (Vector) 22687 Johnson City TX FileGDB USGS Topo Map Vector Data (Vector) 4345 Blanco TX (published 20220820) FileGDB USGS Topo Map Vector Data (Vector) 70297 Hammetts Crossing TX (published 20220822) Shapefile USGS Topo Map Vector Data (Vector) 21293 Howell Mountain TX (published 20220822) FileGDB USGS Topo Map Vector Data (Vector) 30040 Monument Hill TX (published 20220823) FileGDB USGS Topo Map Vector Data (Vector) 34502 Payton TX (published 20220823) Shapefile USGS Topo Map Vector Data (Vector) 34502 Payton TX (published 20220823) FileGDB USGS Topo Map Vector Data (Vector) 38368 Rocky Creek TX (published 20220820) FileGDB USGS Topo Map Vector Data (Vector) 38750 Round Mountain TX (published 20220823) FileGDB USGS US Topo 7.5-minute map for Round Mountain, TX 2019 US Topo 7.5-minute map for Spring Branch, TX US Topo 7.5-minute map for Payton, TX US Topo 7.5-minute map for Howell Mountain, TX USGS Topo Map Vector Data (Vector) 21293 Howell Mountain TX (published 20220822) GeoPackage USGS Topo Map Vector Data (Vector) 34502 Payton TX (published 20220823) GeoPackage USGS Topo Map Vector Data (Vector) 34605 Pedernales Falls TX (published 20220823) GeoPackage USGS NED 1/3 arc-second Contours for Llano E, Texas 20220819 1 x 1 degree Shapefile Water-Quality Data and Geophysical Logs for Determination of Saline Groundwater in Selected Aquifers in Texas, 2021 Geophysical Logs for Determination of Saline Groundwater in Selected Aquifers in Texas, 2021